This book aims to present some recent advances in the exciting research field of inorganic functional materials with hollow interiors as well as the insight into the morphological and structural evolution among them. We have selected our related publications dedicated to the subject covering layered hydroxide and oxide nanocones, inorganic nanotubes, cobalt and nickel oxide nanorings, rare-earth oxide and oxysulfate hollow spheres, transition-metal oxide and chalcogenides hollow spheres, ferrite and metallic and polypyrrole hollow spheres. It surely will be a great relief and pleasure for us if this book provides a candid glimpse to the active and exciting research area of inorganic functional materials with hollow interiors. We sincerely hope that this book may be available for reference to established scientists and scholars.